AUTHORITY: Implementing and authorized by Section 1401(1)(D) of the Safe Drinking Water Act (42 U.S.C. 300f(1)(D)), Subpart C of the National Interim Primary Drinking Water Regulations (40 CFR 141.21 through 141.30), the Clean Water Act (32 U.S.C. 1251), the Illinois Environmental Protection Act [415 ILCS 5], and authorized by Section 4(n) and (o) of the Illinois Environmental Protection Act [415 ILCS 5].
SOURCE: Adopted at 22 Ill. Reg. 5546, effective March 4, 1998; amended at 26 Ill. Reg. 12167, effective July 29, 2002; amended at 30 Ill. Reg. 2507, effective February 10, 2006; amended at 34 Ill. Reg. 9064, effective June 24, 2010; amended at 38 Ill. Reg. 18627, effective September 1, 2014; amended at 43 Ill. Reg. 6175, effective July 1, 2019; amended at 46 Ill. Reg. 3152, effective February 8, 2022; amended at 48 Ill. Reg. 5271, effective March 19, 2024.